Multiple module serial link encryption unit or similar article



FIG. 1 is a perspective view of a multiple module serial link encryption unit or similar article showing our new design;

FIG. 2 is a perspective view thereof with _the hinged keypad in the open position, the keys are shown in broken lines in FIG. 2 for illustrative purposes only;

FIG. 3 is a top view of the unit of FIG. 1; and

FIG. 4 is a side view of the unit of FIG. 1. 

The ornamental design for a multiple module serial link encryption unit or similar article, substantially as shown and described. 